1 /*
2 * Copyright (C) 2007, 2010 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "core/css/CSSFontFaceSrcValue.h"
28
29 #include "core/FetchInitiatorTypeNames.h"
30 #include "core/css/StyleSheetContents.h"
31 #include "core/dom/Document.h"
32 #include "core/dom/Node.h"
33 #include "core/fetch/FetchRequest.h"
34 #include "core/fetch/FontResource.h"
35 #include "core/fetch/ResourceFetcher.h"
36 #include "core/svg/SVGFontFaceElement.h"
37 #include "platform/fonts/FontCache.h"
38 #include "platform/fonts/FontCustomPlatformData.h"
39 #include "wtf/text/StringBuilder.h"
40
41 namespace blink {
42
43 #if ENABLE(SVG_FONTS)
isSVGFontFaceSrc() const44 bool CSSFontFaceSrcValue::isSVGFontFaceSrc() const
45 {
46 return equalIgnoringCase(m_format, "svg");
47 }
48 #endif
49
isSupportedFormat() const50 bool CSSFontFaceSrcValue::isSupportedFormat() const
51 {
52 // Normally we would just check the format, but in order to avoid conflicts with the old WinIE style of font-face,
53 // we will also check to see if the URL ends with .eot. If so, we'll go ahead and assume that we shouldn't load it.
54 if (m_format.isEmpty()) {
55 // Check for .eot.
56 if (!m_resource.startsWith("data:", false) && m_resource.endsWith(".eot", false))
57 return false;
58 return true;
59 }
60
61 if (FontCustomPlatformData::supportsFormat(m_format))
62 return true;
63
64 // We have removed SVG font support on non-gdi platforms. For details, see:
65 // https://groups.google.com/a/chromium.org/d/msg/blink-dev/pYbbUcYvlYY/LQvFvM8KZZEJ
66 #if ENABLE(SVG_FONTS)
67 if (RuntimeEnabledFeatures::svgFontsOnNonGDIPlatformsEnabled()
68 #if OS(WIN)
69 || !FontCache::useDirectWrite()
70 #endif
71 )
72 return isSVGFontFaceSrc();
73 #endif
74 return false;
75 }
76
customCSSText() const77 String CSSFontFaceSrcValue::customCSSText() const
78 {
79 StringBuilder result;
80 if (isLocal())
81 result.appendLiteral("local(");
82 else
83 result.appendLiteral("url(");
84 result.append(m_resource);
85 result.append(')');
86 if (!m_format.isEmpty()) {
87 result.appendLiteral(" format(");
88 result.append(m_format);
89 result.append(')');
90 }
91 return result.toString();
92 }
93
hasFailedOrCanceledSubresources() const94 bool CSSFontFaceSrcValue::hasFailedOrCanceledSubresources() const
95 {
96 if (!m_fetched)
97 return false;
98 return m_fetched->loadFailedOrCanceled();
99 }
100
shouldSetCrossOriginAccessControl(const KURL & resource,SecurityOrigin * securityOrigin)101 bool CSSFontFaceSrcValue::shouldSetCrossOriginAccessControl(const KURL& resource, SecurityOrigin* securityOrigin)
102 {
103 if (resource.isLocalFile() || resource.protocolIsData())
104 return false;
105 return !securityOrigin->canRequest(resource);
106 }
107
fetch(Document * document)108 FontResource* CSSFontFaceSrcValue::fetch(Document* document)
109 {
110 if (!m_fetched) {
111 FetchRequest request(ResourceRequest(document->completeURL(m_resource)), FetchInitiatorTypeNames::css);
112 SecurityOrigin* securityOrigin = document->securityOrigin();
113 if (shouldSetCrossOriginAccessControl(request.url(), securityOrigin)) {
114 request.setCrossOriginAccessControl(securityOrigin, DoNotAllowStoredCredentials);
115 }
116 request.mutableResourceRequest().setHTTPReferrer(m_referrer);
117 m_fetched = document->fetcher()->fetchFont(request);
118 } else {
119 // FIXME: CSSFontFaceSrcValue::fetch is invoked when @font-face rule
120 // is processed by StyleResolver / StyleEngine.
121 restoreCachedResourceIfNeeded(document);
122 }
123 return m_fetched.get();
124 }
125
restoreCachedResourceIfNeeded(Document * document)126 void CSSFontFaceSrcValue::restoreCachedResourceIfNeeded(Document* document)
127 {
128 ASSERT(m_fetched);
129 ASSERT(document && document->fetcher());
130
131 const String resourceURL = document->completeURL(m_resource);
132 if (document->fetcher()->cachedResource(KURL(ParsedURLString, resourceURL)))
133 return;
134
135 FetchRequest request(ResourceRequest(resourceURL), FetchInitiatorTypeNames::css);
136 document->fetcher()->requestLoadStarted(m_fetched.get(), request, ResourceFetcher::ResourceLoadingFromCache);
137 }
138
equals(const CSSFontFaceSrcValue & other) const139 bool CSSFontFaceSrcValue::equals(const CSSFontFaceSrcValue& other) const
140 {
141 return m_isLocal == other.m_isLocal && m_format == other.m_format && m_resource == other.m_resource;
142 }
143
144 }
145